The biggest difference between this deck and other aggrowth decks is Binding Root. This scroll has been extremely useful in the current meta. Most of the time it will be used against champions, god units, and relentless units. It can also be useful against Storm Runner.
If things keep progressing towards these units, it may be worthwhile to remove Stag Heart and only have Binding Root as the sole enchantment in the deck. This will let it be drawn every time by the mystic.